"Ray,
You will definitely have to power the ESCs from the main power distribution connected directly to your 3s/4s battery.
The 3 pin servo connector allows the pixhawk to signal the ESC on how fast to spin the motor and it can also supply 5v power…"
"Brian, I've been doing the same as well.
This is the best that I have found but I haven't ordered it yet.
Here's the content from my post from another board:
What do y'all think about using this shell for a carry…"